Attachment for a horse harness crupper



FIG. 1 is a perspective view of an attachment for a horse harness crupper showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof, the opposite side being a mirror image of that shown;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear end elevation view thereof; and

FIG. 6 is a front end elevation view thereof. 

The ornamental design for attachment for a horse harness crupper, as shown and described. 